Xhaka is good enough to start for Arsenal. He needs a player around him who is more mobile and can run. Gwendouzi isnt that guy. Xhaka needs to cut out his mistakes. His long range passes are good.

No way mate.

If it's between a RB/LB, surely we go for a LB. Monreal is completely finished in this league, and Kolasinac isn't even a LB.

We need two midfielder, at least one wide player, we need a complete rebuilt of our defense.

A LB, a RB, a CB and a goalkeeper

Xhaka is not good enough to start for us but could be a squad player, he should never form part of your 1st XI though if you are serious about challenging for the title.

I'm happy with Maitland-Niles & Bellerin at RB/RWB but Monreal is finished as far as I'm concerned and Mustafi needs to go too so a LB and a CB are the priority. Think it may be difficult to find an LWB that is actually an upgrade on Kolasinac but would be nice if we find a player that could replace Monreal and play both LB/LWB positions.

Certainly don't need a goalkeeper to replace Leno but someone to keep him on his toes and cover if injured - yes.

I agree with. CB, LB and a wide forward but the lack of effective midfield control is what leaves our defence exposed.
We have no control in that area with this lot. Xhaka is slow, ponderous and lacks awareness of runners, Ozil is lazy and cowardly, Elneny will struggle in the championship and Gwen is not ready.
Just imagine what a peak Rosicky/Cazorla and Vieira will bring to this side.